The invention relates to a noise-reducing tail gas filter. The noise-reducing tail gas filter comprises a filter box (1), a fire extinguisher (7) and a silencer (8). A filter screen (2) and a ceramic honeycomb carrier (3) are arranged in the filter box (1), a silencing tube (9) is arranged in the filter box (1), and a branch tube (10) with holes on the wall is arranged on the silencing tube (9). According to the noise-reducing tail gas filter provided by the invention, firstly, under the action of the silencer and the fire extinguisher, noise is reduced and the fire is extinguished; then acidic components in the tail gas are eliminated by means of sodium carbonate water mist; and finally, under two-stage filtration of the filter screen and the ceramic honeycomb carrier, tail gas, the main components of which are CO, HC and NOx, is reacted to form CO2, H2O, N2 and O2, and meanwhile, micropores in the isolating walls can effectively filter black smoke particles which can be combusted under the action of a catalyst coating, so that the tail gas purifying effect is further improved; and meanwhile, the filter is good in silencing effect.